diagnosing-bugs
diagnosing-bugs is an agent skill published by mattpocock, listed under review & testing. It lives in the mattpocock/skills repository, which has 303,549 GitHub stars and is licensed under MIT; we last read it on 2026-10-08.
Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.
Install
skills is a generic installer for any repository of Claude agent skills -- it reads mattpocock/skills’s own structure rather than assuming one, the same way this page reads the skill’s own SKILL.md rather than assuming a format.
npx skills add mattpocock/skills
Maintenance
Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.
diagnosing-bugs compared with similar skills
| Skill | Publisher | What it does | Repo stars | Last update |
|---|---|---|---|---|
| diagnosing-bugs (this page) | mattpocock | Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or… | 303,549 | 2026-10-22 |
| code-review(same repository) | mattpocock | Review the changes since a fixed point (commit, branch, tag, or merge-base) along two axes: Standards (does t… | 303,549 | 2026-10-22 |
| scaffold-exercises(same repository) | mattpocock | Create exercise directory structures with sections, problems, solutions, and explainers that pass linting. Us… | 303,549 | 2026-10-22 |
| tdd(same repository) | mattpocock | Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-gree… | 303,549 | 2026-10-22 |
| webapp-testing | anthropic | Toolkit for interacting with and testing local web applications using Playwright. Supports verifying frontend… | 183,845 | 2026-10-09 |
| browser-testing-with-devtools | addyosmani | Tests in real browsers via Chrome DevTools MCP. Use when building or debugging anything that runs in a browse… | 110,611 | 2026-10-13 |
| code-review-and-quality | addyosmani | Conducts multi-axis code review. Use before merging any change. Use when reviewing code written by yourself,… | 110,611 | 2026-10-13 |
Skills from the same repository first, then others for this job by repository stars. Figures are from each repository when we last read it.
Common questions about diagnosing-bugs
- What does diagnosing-bugs do?
- Diagnosis loop for hard bugs and performance regressions. Use when the user says "diagnose"/"debug this", or reports something broken/throwing/failing/slow.
- How do I install diagnosing-bugs?
- Run npx skills add mattpocock/skills. The skills installer reads the repository’s own structure, so it works for any repository of agent skills.
- Who publishes diagnosing-bugs?
- mattpocock.
- Is diagnosing-bugs maintained, and what licence does it use?
- Its repository has 303,549 GitHub stars and its state in our directory is listed. Its last commit we recorded was on 2026-10-22. The repository declares the MIT licence.
More agent skills for review & testing
- browser-testing-with-devtoolsby addyosmani
- code-review-and-qualityby addyosmani
- code-simplificationby addyosmani
- doubt-driven-developmentby addyosmani
- vitestby antfu
- webapp-testingby anthropic